Durable composite particle board and process for making the same

Abstract

The application relates to the technical field of artificial boards, in particular to a durable composite shaving board, which comprises a shaving board body, the shaving board body is formed by paving a surface layer, a decorative layer, a core layer and a back layer from top to bottom and heat pressing, the surface layer is made of high-density fiber material, high-density fiber material and shaving board are used as main materials, so that the shaving board body has higher density and strength, moisture-proof fiber plates are added as the back layer in the preparation process, the shaving board is effectively prevented from being affected by a humid environment, phenolic resin is used as a main adhesive, the firm adhesion between the layers can be ensured, the service life of the shaving board is prolonged, the visual indication is provided by using the red-green color visual angle color change of the rechecking disc, the workers can more accurately judge whether the shaving board is spliced in place, so that the risk of human errors can be reduced, and the accuracy and precision of the splicing operation of the shaving board body can be improved.

Description

Technical Field

[0001] This invention relates to the field of engineered wood products technology, specifically to a durable composite particleboard and its preparation process. Background Technology

[0002] Particleboard is a type of wood-based panel made from processed wood chips or sawdust. It is typically produced by cutting logs, removing bark and impurities, and then processing the wood into small chips or sawdust through rotary cutting, planing, or crushing. These chips or sawdust are then pre-treated, dehydrated, dried, and bonded with adhesives before being hot-pressed under high temperature and pressure to form particleboard.

[0003] In the traditional process of splicing particleboard, manual operation is required. If the operation is inaccurate or careless, it is easy to cause the splicing to be incomplete. Moreover, human visual judgment is sometimes inaccurate, making it difficult to accurately judge the position and angle of the splicing, resulting in unevenness due to incomplete splicing. Workers can only rely on experience to judge the splicing effect, which carries the risk of human error.

[0004] Meanwhile, traditional splicing methods such as tongue and groove or right angle splicing have poor stability. Because the contact area of ​​traditional tongue and groove or right angle splicing methods is relatively limited, the structural support area is small and cannot provide sufficient support force. This will easily lead to stress concentration at the connection, increasing the instability of the component under stress. In addition, when tongue and groove or right angle splicing methods are subjected to external forces, the connection is prone to warping deformation, resulting in unstable connection and inability to provide sufficient support force and tensile strength.

[0005] Therefore, this invention proposes a durable composite particleboard and its preparation process to compensate for and improve the deficiencies of the prior art. Summary of the Invention

[0006] In view of the deficiencies of the existing technology, the present invention provides a durable composite particleboard and its preparation process, which can effectively solve the related technical problems mentioned in the background.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention discloses a durable composite particleboard, comprising a particleboard body, wherein the particleboard body is formed by laying and hot-pressing a surface layer, a decorative layer, a core layer and a back layer from top to bottom; the surface layer is made of high-density fiber material; the core layer is made of high-density particleboard; the back layer is made of moisture-proof fiberboard; and the surface layer, decorative layer, core layer and back layer are all fixed together with adhesive.

[0009] The outer edge of the particleboard body is provided with an assembly reinforcement mechanism for splicing multiple particleboards, and an assembly re-inspection mechanism for assisting personnel in judging whether the assembly is in place.

[0010] Preferably, the assembly reinforcement mechanism includes a reinforcement frame disposed on the outer edge of the particleboard body. One side surface of the reinforcement frame is provided with an assembly groove, and the other side of the reinforcement frame is provided with an assembly tenon. Both the assembly groove and the assembly tenon are isosceles trapezoids. A locking plate is slidably connected to the inside of the reinforcement frame near the assembly groove. A magnetic block is fixedly connected to the surface of the locking plate near the assembly groove. A locking groove is provided on one side of the assembly tenon at the position corresponding to the locking plate. The inner wall of the locking groove at the position corresponding to the magnetic block is made of magnetic material, and the magnetism is opposite to that of the magnetic block.

[0011] Preferably, the mounting groove and the mounting tenon are positioned to correspond to each other, and the surfaces of both the mounting groove and the mounting tenon are roughened.

[0012] Preferably, the assembly re-inspection mechanism includes an inner mounting groove inside the reinforcing frame, located at the end near the assembly slot. A spring is fixedly connected inside the inner mounting groove, and an auxiliary block is fixedly connected to the end of the spring near the assembly slot. The auxiliary block is generally an isosceles triangle, and the inner mounting groove can accommodate the auxiliary block. An auxiliary groove is provided at the position of the assembly tenon corresponding to the auxiliary block. A connecting groove is provided through the side of the auxiliary groove near the particleboard body. A grooved rod is slidably connected to the center of the connecting groove, and the grooved rod is slidably connected to the connecting groove. A second spring is fixedly connected to the connecting part. The rebound force of the first spring ensures that the second spring is always in a compressed state. The end of the second spring away from the grooved rod is fixedly connected to the inner wall of the connecting groove. A toothed plate is fixedly connected to the lower surface of the grooved rod near the connecting groove. A rod-grooved wheel is meshed below the toothed plate. The rod-grooved wheel is rotatably connected to the inner wall of the connecting groove. The end of the rod-grooved wheel away from the toothed plate passes through the reinforcing frame. A re-inspection disc is fixedly connected to the end of the rod-grooved wheel that passes through the reinforcing frame. The surface of the re-inspection disc away from the reinforcing frame is provided with symmetrical red and green parts.

[0013] Preferably, the upper and lower end faces of the auxiliary block are symmetrically provided with cylindrical protrusions, and are slidably connected to the inner wall of the mounting groove through the cylindrical protrusions.

[0014] Preferably, the end of the grooved rod located inside the auxiliary groove has a triangular groove, and the triangular groove is adapted to the shape of the auxiliary block, and the position of the triangular groove corresponds to the position of the auxiliary block.

[0015] Preferably, the movement distance of the auxiliary block reset process can be achieved by driving the rod-driven grooved wheel and the re-inspection disc to rotate 180 degrees through the grooved rod and toothed plate.

[0016] Another technical solution of the present invention, a preparation process for a durable composite particleboard, includes the following steps:

[0017] Step 1: Prepare materials: high-density fiber material, high-density particleboard, moisture-proof fiberboard, and cut the surface layer, decorative layer, core layer, back layer, and reinforcing frame to the same size as required;

[0018] Step 2: Preparation of adhesive: Phenolic resin is used as the main base material of the adhesive. The adhesive is prepared by mixing 15% phenolic resin with 85% water and heating to 170-190℃.

[0019] Step 3: Combining Levels:

[0020] The first step is to place the cut high-density fiber surface layer horizontally on the workbench and apply a layer of adhesive to its surface layer;

[0021] The second step is to place the cut high-density particleboard core layer horizontally on the surface coated with adhesive, and apply appropriate pressure to ensure that it is tightly bonded to the surface layer. After bonding is completed, apply adhesive to the surface of the core layer again.

[0022] The third step is to align the cut decorative layer horizontally on the upper surface of the core layer with adhesive, apply appropriate pressure to make the decorative layer and the core layer adhere tightly, and after the adhesion is completed, apply adhesive to the surface of the decorative layer again.

[0023] The fourth step is to place the cut back layer of the moisture-proof fiberboard on the upper surface of the decorative layer with adhesive, and apply appropriate pressure to make it adhere tightly to the decorative layer.

[0024] Step 4: Place the assembled particleboard body into a preheated press for high-pressure pressing and heat curing, and control the internal temperature of the press between 120°C and 180°C to ensure that the phenolic resin coating is firmly bonded to each layer.

[0025] Step 5: After hot pressing is completed, remove the particleboard body and place it in a well-ventilated place for cooling and curing. After the particleboard body has cooled, trim and decorate its edges. After trimming, install the reinforcing frame on the outer edge of the reinforcing frame according to the dimensions.

[0026] Step Six: Pack the prepared particleboard body and place it in a dry and ventilated warehouse to prevent moisture and deformation.

[0027] Preferably, the reinforcing frame in step five is made of high-strength plastic, and the reinforcing frame is threadedly connected to the outer edge of the particleboard body with screws.

[0028] Compared with known public technologies, the technical solution provided by this invention has the following beneficial effects:

[0029] 1. This invention incorporates a re-inspection disc during the splicing of two particleboard pieces to indicate whether the splicing is in place. This assists workers in judging the splicing effect between the two particleboard pieces, preventing unevenness caused by improper splicing. The red and green color changes of the re-inspection disc provide visual indication, helping workers to more accurately determine whether the particleboard is properly spliced. This not only reduces the risk of human error but also improves the accuracy and precision of particleboard splicing operations.

[0030] 2. This invention utilizes a reinforcing frame made of high-strength plastic material, which provides additional structural support and stability to the particleboard body, making the splicing of two particleboard bodies more secure. Compared with traditional tongue-and-groove or right-angle splicing, the connection method of the mounting grooves and tenons on both sides of the reinforcing frame is tighter, providing better support and tensile strength. The combination of these two allows the two particleboard bodies to be spliced ​​more quickly and accurately, and automatic locking can be achieved by setting a magnetic locking plate, without the need for additional fixing tools or materials, thus greatly simplifying the splicing process of particleboard bodies.

[0031] 3. The particleboard body prepared by this invention uses high-density fiber material and particleboard as the main materials, which makes the particleboard body have higher density and strength, improves the durability and stability of the board, and adds moisture-proof fiberboard as a back layer during the preparation process to effectively prevent the particleboard from being affected by the humid environment. Phenolic resin is used as the main adhesive, which has good heat resistance and water resistance, and can ensure a strong bond between the layers, increasing the service life of the particleboard. Attached Figure Description

[0032] The invention is further described with reference to embodiments illustrated in the following figures, wherein:

[0033] Figure 1 This is a front-view perspective structural diagram of the present invention;

[0034] Figure 2 This is a partial three-dimensional structural diagram of the particleboard body in this invention;

[0035] Figure 3 For the present invention Figure 1 A magnified 3D structural diagram of a portion of point A in the middle;

[0036] Figure 4 For the present invention Figure 1 A magnified 3D structural diagram of a portion of point B in the middle;

[0037] Figure 5 This is a partial top-view perspective view of the assembly groove and assembly tenon in this invention;

[0038] Figure 6 This is a partial three-dimensional structural diagram of the interior of the mounting groove in this invention;

[0039] Figure 7 This is a partial three-dimensional structural diagram of the auxiliary groove in this invention;

[0040] Figure 8 This is a partial three-dimensional structural diagram of the interior of the connecting groove in this invention.

[0041] The labels in the diagram represent:

[0042] 1. Particleboard body; 11. Surface layer; 12. Decorative layer; 13. Core layer; 14. Back layer;

[0043] 21. Reinforcing frame; 22. Assembly slot; 23. Assembly tenon; 24. Locking plate; 25. Magnetic block; 26. Locking groove;

[0044] 31. Install inner groove; 32. Auxiliary block; 33. Spring 1; 34. Auxiliary groove; 35. Grooved rod; 36. Connecting groove; 37. Spring 2; 38. Toothed plate; 39. Grooved wheel with rod; 310. Re-inspection disc. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0046] The present invention will be further described below with reference to embodiments.

[0047] Embodiments of the present invention

[0048] Reference Figures 1 to 8 As shown:

[0049] A durable composite particleboard includes a particleboard body 1. The particleboard body 1 is formed by laying and hot-pressing a surface layer 11, a decorative layer 12, a core layer 13, and a back layer 14 from top to bottom. The surface layer 11 is made of high-density fiber material, the core layer 13 is made of high-density particleboard, and the back layer 14 is made of moisture-proof fiberboard. The surface layer 11, the decorative layer 12, the core layer 13, and the back layer 14 are all fixed together with adhesive.

[0050] The outer edge of the particleboard body 1 is provided with an assembly reinforcement mechanism for splicing multiple particleboard pieces, and an assembly re-inspection mechanism for assisting personnel in judging whether the assembly is in place.

[0051] The assembly reinforcement mechanism includes a reinforcement frame 21 set on the outer edge of the particleboard body 1. An assembly groove 22 is provided on one side surface of the reinforcement frame 21, and an assembly tenon 23 is provided on the other side of the reinforcement frame 21. Both the assembly groove 22 and the assembly tenon 23 are isosceles trapezoids. A locking plate 24 is slidably connected inside the side of the reinforcement frame 21 near the assembly groove 22. A magnetic block 25 is fixedly connected to the surface of the locking plate 24 near the assembly groove 22. A locking groove 26 is provided on one side of the assembly tenon 23 at the position corresponding to the locking plate 24. The inner wall of the locking groove 26 at the position corresponding to the magnetic block 25 is made of magnetic material, and the magnetism is opposite to that of the magnetic block 25.

[0052] The positions of the assembly groove 22 and the assembly tenon 23 correspond to each other, and the surfaces of both the assembly groove 22 and the assembly tenon 23 are roughened.

[0053] The assembly re-inspection mechanism includes an inner mounting groove 31 located inside the reinforcing frame 21. The inner mounting groove 31 is located at the end near the assembly slot 22. A spring 33 is fixedly connected inside the inner mounting groove 31. An auxiliary block 32 is fixedly connected to the end of the spring 33 near the assembly slot 22. The auxiliary block 32 is generally in the shape of an isosceles triangle. The inner mounting groove 31 can accommodate the auxiliary block 32. An auxiliary groove 34 is provided at the position of the assembly tenon 23 corresponding to the position of the auxiliary block 32. A connecting groove 36 is provided through the side of the auxiliary groove 34 near the particleboard body 1. A grooved rod 35 is slidably connected to the center of the connecting groove 36. The part where the grooved rod 35 is slidably connected to the connecting groove 36 is fixed. A second spring 37 is connected, and the rebound force of the first spring 33 keeps the second spring 37 in a compressed state. The end of the second spring 37 away from the grooved rod 35 is fixedly connected to the inner wall of the connecting groove 36. A toothed plate 38 is fixedly connected to the lower surface of the grooved rod 35 near the connecting groove 36. A rod-driven grooved wheel 39 is meshed below the toothed plate 38. The rod-driven grooved wheel 39 is rotatably connected to the inner wall of the connecting groove 36. The end of the rod-driven grooved wheel 39 away from the toothed plate 38 passes through the reinforcing frame 21. A re-inspection disc 310 is fixedly connected to the end of the rod-driven grooved wheel 39 passing through the reinforcing frame 21. The surface of the re-inspection disc 310 away from the reinforcing frame 21 is provided with symmetrical red and green parts.

[0054] The upper and lower end faces of the auxiliary block 32 are symmetrically provided with cylindrical protrusions, and are slidably connected to the inner wall of the mounting groove 31 through the cylindrical protrusions;

[0055] The end of the grooved rod 35 located inside the auxiliary groove 34 has a triangular groove, and the triangular groove is adapted to the shape of the auxiliary block 32, and the position of the triangular groove corresponds to the position of the auxiliary block 32.

[0056] The movement distance of the auxiliary block 32 during the reset process can be driven by the grooved rod 35 and the toothed plate 38 to rotate the rod-grooved wheel 39 and the re-inspection disc 310 by 180 degrees.

[0057] As another embodiment of the present invention

[0058] A process for preparing a durable composite particleboard includes the following steps:

[0059] Step 1: Prepare materials: high-density fiber material, high-density particleboard, moisture-proof fiberboard, and cut the surface layer 11, decorative layer 12, core layer 13, back layer 14, and reinforcing frame 21 into the same size as required;

[0060] Step 2: Preparation of adhesive: Phenolic resin is used as the main base material of the adhesive. The adhesive is prepared by mixing 15% phenolic resin with 85% water and heating to 190°C.

[0061] Step 3: Combining Levels:

[0062] The first step is to place the surface layer 11, which is cut into high-density fiber material, horizontally on the workbench and apply a layer of adhesive to the surface layer 11.

[0063] The second step is to place the cut high-density particleboard core layer 13 horizontally on the upper surface of the adhesive-coated surface layer 11 and apply appropriate pressure to ensure that it is tightly bonded to the surface layer 11. After bonding is completed, apply adhesive again to the surface of the core layer 13.

[0064] The third step is to align the cut decorative layer 12 horizontally on the upper surface of the core layer 13 with adhesive, apply appropriate pressure to make the decorative layer 12 and the core layer 13 bond tightly, and after bonding is completed, apply adhesive to the surface of the decorative layer 12 again.

[0065] The fourth step is to place the cut back layer 14 made of moisture-proof fiberboard on the upper surface of the decorative layer 12 with adhesive, and apply appropriate pressure to make it adhere tightly to the decorative layer 12.

[0066] Step 4: Place the assembled particleboard body 1 into a preheated press for high-pressure pressing and heat curing, and control the internal temperature of the press at 180℃ to ensure that the phenolic resin coating is firmly bonded to each layer.

[0067] Step 5: After hot pressing is completed, take out the particleboard body 1 and place it in a well-ventilated place for cooling and curing. After the particleboard body 1 has cooled, trim and decorate its edges. After trimming, install the reinforcing frame 21 on the outer edge of the reinforcing frame 21 according to the dimensions.

[0068] Step 6: Pack the prepared particleboard body 1 and place it in a dry and ventilated warehouse to prevent moisture and deformation;

[0069] In step five, the reinforcing frame 21 is made of high-strength plastic material, and the reinforcing frame 21 is connected to the outer edge of the particleboard body 1 by screws.

[0070] The complete working principle and steps of the above embodiments are as follows:

[0071] First, when the staff needs to assemble two particleboard bodies 1, they can place the two particleboard bodies 1 horizontally on the table, then place the mounting grooves 22 and mounting tenons 23 on the two particleboard bodies 1 on the side that are close to each other, then align the mounting tenons 23 horizontally inside the mounting grooves 22, and then the staff can push the particleboard bodies 1 in by hand.

[0072] As the particleboard body 1 is pushed in, the reinforcing frame 21 will first contact the outer surface of the auxiliary block 32. As the particleboard body 1 continues to be pushed in, the tenon 23 will also contact the outer surface of the auxiliary block 32. Since the auxiliary block 32 is an isosceles triangle, specifically... Figure 5 As shown, with the contact between the reinforcing frame 21 and the mounting tenon 23, the auxiliary block 32 will be displaced towards the interior of the mounting groove 31. During this process, the spring 33 is continuously compressed. As the particleboard body 1 is pushed in, the auxiliary block 32 will remain inside the mounting groove 31.

[0073] As the particleboard body 1 and the mounting tenon 23 are continuously pushed in, when the position of the auxiliary block 32 corresponds to the position of the auxiliary groove 34, the auxiliary block 32 will be inserted into the auxiliary groove 34 under the rebound force of the spring 33. At the same time, the auxiliary block 32 pushes the grooved rod 35 horizontally towards the inside of the connecting groove 36. During this process, the grooved rod 35 will slide along the part where it is slidably connected to the connecting groove 36, as shown in the figure. Figure 8 As shown, spring 37 is in a compressed state at the same time;

[0074] As the grooved rod 35 moves horizontally into the connecting groove 36, it drives the rod-driven grooved wheel 39 to rotate via the toothed plate 38. The movement distance of the auxiliary block 32 during its reset process allows the grooved rod 35 and toothed plate 38 to drive the rod-driven grooved wheel 39 and the inspection disc 310 to rotate 180 degrees. Since the inspection disc 310 has symmetrical red and green sections on its surface away from the reinforcing frame 21, the rotation of the rod-driven grooved wheel 39 180 degrees will synchronously drive the inspection disc 310 to rotate 180 degrees as well. At this point, the green section of the inspection disc 310 will rotate upwards. Workers can then observe whether the inspection disc 310 has turned green to determine if the two particleboard bodies 1 are properly assembled.

[0075] Therefore, by setting up a re-inspection disc 310 during the splicing process of two particleboard bodies 1, which can indicate whether the splicing is in place, the staff can be assisted in judging the splicing effect between the two particleboard bodies 1, avoiding unevenness between the two particleboard bodies 1 due to improper splicing. The red and green color changes of the re-inspection disc 310 provide visual indication to help the staff judge more accurately whether the particleboard is spliced ​​in place. This not only reduces the risk of human error, but also improves the accuracy and precision of the splicing operation of particleboard bodies 1.

[0076] Meanwhile, since a locking plate 24 is slidably connected inside the side of the reinforcing frame 21 near the mounting groove 22, and a magnetic block 25 is fixedly connected to the surface of the locking plate 24 near the mounting groove 22, and a locking groove 26 is opened on one side of the mounting tenon 23 corresponding to the position of the locking plate 24, and the inner wall of the locking groove 26 corresponding to the position of the magnetic block 25 is made of magnetic material, and the magnetism is opposite to that of the magnetic block 25, after the two particleboard bodies 1 are spliced, the locking plate 24 and the locking groove 26 correspond to each other. At this time, under the magnetic attraction of the opposite magnetism of the magnetic block 25 and the inner wall of the locking groove 26, the locking plate 24 will be moved closer to the inside of the locking groove 26, and the automatic splicing of the two particleboard bodies 1 will be completed automatically.

[0077] Therefore, by using the reinforcing frame 21 made of high-strength plastic material, additional structural support and stability can be provided for the particleboard body 1, making the splicing of the two particleboard bodies 1 more secure. Compared with the traditional tongue and groove or right angle splicing, the connection method of the mounting groove 22 and mounting tenon 23 on both sides of the reinforcing frame 21 is tighter, which can provide better support and tensile strength. The cooperation of the two allows the two particleboard bodies 1 to be spliced ​​more quickly and accurately, and automatic locking can be achieved by setting the magnetic locking plate 24, without the need for additional fixing tools or materials, thus greatly simplifying the splicing process of the particleboard body 1.

[0078] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A durable composite particleboard, comprising a particleboard body, characterized in that, The particleboard body is formed by laying out a surface layer, a decorative layer, a core layer, and a back layer from top to bottom and then hot-pressing them. The surface layer is made of high-density fiber material, the core layer is made of high-density particleboard, and the back layer is made of moisture-proof fiberboard. The surface layer, decorative layer, core layer, and back layer are all fixed together with adhesive. The outer edge of the particleboard body is provided with an assembly reinforcement mechanism for splicing multiple particleboards, and an assembly re-inspection mechanism for assisting personnel in judging whether the assembly is in place. The assembly reinforcement mechanism includes a reinforcement frame disposed on the outer edge of the particleboard body. One side surface of the reinforcement frame is provided with an assembly groove, and the other side of the reinforcement frame is provided with an assembly tenon. Both the assembly groove and the assembly tenon are isosceles trapezoids. A locking plate is slidably connected to the inside of the reinforcement frame near the assembly groove. A magnetic block is fixedly connected to the surface of the locking plate near the assembly groove. A locking groove is provided on one side of the assembly tenon at the position corresponding to the locking plate. The inner wall of the locking groove at the position corresponding to the magnetic block is made of magnetic material, and the magnetic poles of the magnetic material are opposite to the magnetic poles of the magnetic block. The assembly re-inspection mechanism includes an inner mounting groove inside the reinforcing frame. The inner mounting groove is located at one end near the assembly slot. A spring is fixedly connected inside the inner mounting groove. An auxiliary block is fixedly connected to one end of the spring near the assembly slot. The auxiliary block is generally isosceles triangular. The inner mounting groove accommodates the auxiliary block. An auxiliary groove is formed at the position of the assembly tenon corresponding to the auxiliary block. A connecting groove is formed through the auxiliary groove on the side near the particleboard body. A grooved rod is slidably connected to the center of the connecting groove. A second spring is fixedly connected to the part where the rod slides into the connecting groove. The end of the second spring away from the grooved rod is fixedly connected to the inner wall of the connecting groove. A toothed plate is fixedly connected to the lower surface of the grooved rod near the connecting groove. A rod-driven grooved wheel is meshed below the toothed plate. The rod-driven grooved wheel is rotatably connected to the inner wall of the connecting groove. The end of the rod-driven grooved wheel away from the toothed plate passes through a reinforcing frame. A re-inspection disc is fixedly connected to the end of the rod-driven grooved wheel that passes through the reinforcing frame. The surface of the re-inspection disc away from the reinforcing frame has symmetrical red and green parts.

2. The durable composite particleboard according to claim 1, characterized in that, The mounting groove and the mounting tenon are positioned corresponding to each other, and the surfaces of both the mounting groove and the mounting tenon are roughened.

3. The durable composite particleboard according to claim 1, characterized in that, The auxiliary block has cylindrical protrusions symmetrically arranged on its upper and lower end faces, and is slidably connected to the inner wall of the mounting groove through the cylindrical protrusions.

4. The durable composite particleboard according to claim 1, characterized in that, The end of the grooved rod located inside the auxiliary groove has a triangular groove, which is adapted to the shape of the auxiliary block, and the position of the triangular groove corresponds to the position of the auxiliary block.

5. A durable composite particleboard according to claim 1, characterized in that, During the reset process of the auxiliary block, the grooved rod and toothed plate drive the rod-driven grooved wheel and the re-inspection disc to rotate 180 degrees.

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